Having endured abuse and depression since childhood, Mariko Ikagawa found comfort in Tomoyo Shiino, marking the beginning of a friendship that lasted into adulthood. Now a 26-year-old office worker, Shiino is stunned when a news report announces that Mariko has taken her own life. Although Shiino initially doubts the report, she accepts the reality after failing to reach Mariko and starts to question the reasons behind her suicide. Determined to free her from her despicable father, Shiino impulsively steals Mariko's remains from him. Reunited with her dear friend, Shiino travels to a specific location Mariko had wished to visit, all while recalling their happy memories together.